EP2081290A2 - Electric wheelchair drive - Google Patents

Electric wheelchair drive Download PDF

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Publication number
EP2081290A2
EP2081290A2 EP09000347A EP09000347A EP2081290A2 EP 2081290 A2 EP2081290 A2 EP 2081290A2 EP 09000347 A EP09000347 A EP 09000347A EP 09000347 A EP09000347 A EP 09000347A EP 2081290 A2 EP2081290 A2 EP 2081290A2
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EP
European Patent Office
Prior art keywords
motor
electric wheelchair
wheelchair drive
brushed
power
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09000347A
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German (de)
French (fr)
Other versions
EP2081290A3 (en
Inventor
Klaus Busche
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Meyra GmbH
Original Assignee
Meyra Wilhelm Meyer GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Meyra Wilhelm Meyer GmbH and Co KG filed Critical Meyra Wilhelm Meyer GmbH and Co KG
Publication of EP2081290A2 publication Critical patent/EP2081290A2/en
Publication of EP2081290A3 publication Critical patent/EP2081290A3/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/04—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs motor-driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
    • B60L3/0092—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption with use of redundant elements for safety purposes
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
    • A61G5/10—Parts, details or accessories
    • A61G5/1005—Wheelchairs having brakes
    • A61G5/1032—Wheelchairs having brakes engaging an element of the drive or transmission, e.g. drive belt, electrodynamic brake
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/64—Electric machine technologies in electromobility

Definitions

  • the present invention relates to an electric wheelchair drive with a brushed DC (DC) motor.
  • DC brushed DC
  • WO 96/03798 From the WO 96/03798 is a multi-pole brushed DC motor which can be switched depending on demand and load.
  • the pool pairs of the engine is preceded by an electronic circuit, which connects individual pole pairs with their brushes via controllable switch to the supply voltage or switches off.
  • multi-pole DC motors especially three-phase motors
  • each associated power stage controls the windings of the motors so that a multi-phase alternating current is generated
  • brushless DC motors Furthermore, previously known are multi-pole brushless DC motors, whose operation respectively associated power stages, the windings drive so that a pulsed direct current is generated (stepper motors).
  • the electric wheelchair drive according to the invention with a brushed DC motor, wherein the brushed DC motor has at least four poles, is characterized in that at least two pole pairs of the brushed DC motor are permanently operated at an independent power level. This makes it possible by the inventive division of the total power to several power levels, a reduction in power loss per harness and power level.
  • Another advantage of using multiple power stages according to the invention is the resulting redundancy in the controller. If, for example, one power stage is inoperable, at least one second power level remains to ensure the drive (emergency running property). The same applies in case of malfunction of a brush or a pole pair. Due to the principle of overloading of the remaining pole pair can be prevented
  • An advantageous embodiment of the invention provides at least for two pairs of poles each a current measuring point for the regulation or limitation of the respective phase currents. This allows precise control of the individual power levels.
  • a device for detecting and evaluating a fault situation in the electronic control.
  • a suitable, automatic reaction of the control eg the emergency shutdown of the affected circuit or the Transition to a mode with reduced drive power (emergency function).
  • the risk of consequential damage after a disturbance can be significantly reduced.
  • a device for determining the total current for limiting the total power of the brushed DC motor within the electric wheelchair drive is provided. The currents of the individual power levels can also be measured and summed separately. As a result, an overload of the DC motor as a whole or in parts is avoided even when using multiple power levels according to the invention.
  • a controller for the electric wheelchair drive which can operate alternatively two independent brushed DC motors.
  • the two pole pairs of a four-pole DC motor can be operated. All other devices of the controller (control of the spring-loaded brake, control of vehicle lighting, etc.) can continue to be used unchanged.
  • Special advantage of the control, which alternatively can operate two independent brushed DC motors is the potential use of proven conventional connectors rather than expensive special solutions. Thus, the effort for the adaptation of existing control designs minimizes the electric wheelchair drive according to the invention.
  • the emergency running property according to the invention by the use of several power levels is particularly advantageous.
  • the risk of an immobilized wheelchair is minimized.
  • From the inventive measurement of the rotational speed of the DC motor results in the possibility of controlling the speed of the wheelchair or limit. This can be of great advantage, especially when using the vehicle by a disabled person.
  • power wheelchair in the context of this invention includes in addition to electric wheelchair and wheelchair-like electric vehicles for people with mobility impairments.
  • Fig. 1 an electric wheelchair drive 1 according to an embodiment of the invention described.
  • Fig. 1 shows as an exemplary embodiment of the inventive construction of an electric wheelchair drive 1 with two power levels 5, 6, a battery 4, a four-pole DC (DC motor) motor 2 and a spring pressure brake 3 and a brake control 7 of the spring-loaded brake third
  • the power levels 5, 6 and the brake control 7 are connected via the lines 10 to the battery 4.
  • the lines 10 to the battery 4.
  • any type of battery or Akkumulatorenart is the use of any type of battery or Akkumulatorenart.
  • first power stage 5 is connected via the electrical lines 11 and brushes on the motor 2 to the first pole pair 8 of the motor 2.
  • second power stage 6 is connected via the electrical lines 12 and brushes on the motor 2 to the second pole pair 9 of the motor 2.
  • the energy of the battery 4 can thus drive the motor 2 either via both power stages 5, 6 or only via one of the two power stages 5, 6.
  • Provided according to the invention is both the use of infinitely variable and not continuously adjustable power levels.
  • An emergency running property of the electric wheelchair drive 1 results from the possibility of being able to operate the engine 2 with only one of the two power levels 5, 6.
  • the power loss per line is reduced as the total current load is split between line 11 and line 12.
  • the control of the spring pressure brake 3 via the line 13 and the brake control 7 is made possible by the inventive use of a controller, which alternatively can operate two independent brushed DC motors.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Energy (AREA)
  • Transportation (AREA)
  • Sustainable Development (AREA)
  • Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Control Of Multiple Motors (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

The drive (1) has a four-poled brush-afflicted direct current motor (2) with two pairs of poles (8, 9) durably operated at each independent power stage (5, 6). Each power-measuring area controls and/or limits respective phase currents and is provided for the pairs of poles. A recognition and evaluation device recognizes and evaluates a short-circuit situation at lines (11, 12) or at the motor and in an electronic controller. A voltage measuring area is provided for the power stages for measuring an applied voltage of the respective pair of poles.

Description

Die vorliegende Erfindung betrifft einen Elektrorollstuhlantrieb mit einem bürstenbehafteten DC (Gleichstrom) Motor.The present invention relates to an electric wheelchair drive with a brushed DC (DC) motor.

Vorbekannt sind mehrpolige bürstenbehaftete DC Motoren mit entsprechend dauerhaft verschalteten Polpaaren, die an einer gemeinsamen Leistungsstufe (Vollbrücke oder Halbbrücke) betrieben werden.Previously known are multi-pole brushed DC motors with corresponding permanently interconnected pole pairs, which are operated at a common power level (full bridge or half bridge).

Aus der WO 96/03798 ist ein mehrpoliger bürstenbehafteter DC Motor, welcher abhängig von Bedarf und Last geschaltet werden kann, bekannt. Den Poolpaaren des Motors ist eine elektronische Schaltung vorgeschaltet, welche einzelne Polpaare mit ihren Bürsten über steuerbare Schalter an die Versorgungsspannung zu- bzw. abschaltet.From the WO 96/03798 is a multi-pole brushed DC motor which can be switched depending on demand and load. The pool pairs of the engine is preceded by an electronic circuit, which connects individual pole pairs with their brushes via controllable switch to the supply voltage or switches off.

Ferner bekannt sind mehrpolige DC Motoren (speziell dreiphasige Motoren), wobei eine jeweils zugeordnete Leistungsstufe die Wicklungen der Motoren so ansteuert, dass ein mehrphasiger Wechselstrom erzeugt wird (bürstenlose DC Motoren). Des Weiteren vorbekannt sind mehrpolige bürstenlose DC Motoren, zu deren Betrieb jeweils zugeordnete Leistungsstufen die Wicklungen so ansteuern, dass ein gepulster Gleichstrom erzeugt wird (Schrittmotoren).Also known are multi-pole DC motors (especially three-phase motors), with each associated power stage controls the windings of the motors so that a multi-phase alternating current is generated (brushless DC motors). Furthermore, previously known are multi-pole brushless DC motors, whose operation respectively associated power stages, the windings drive so that a pulsed direct current is generated (stepper motors).

Es ist daher Aufgabe der vorliegenden Erfindung, einen Elektrorollstuhlantrieb bereitzustellen, welche bei einfachem und kostengünstigem Aufbau eine sichere, sparsame und komfortable Steuerung ermöglicht.It is therefore an object of the present invention to provide a power wheelchair drive, which allows a simple and inexpensive construction safe, economical and comfortable control.

Diese Aufgabe wird durch einen Elektrorollstuhlantrieb mit den Merkmalen des Anspruchs 1 gelöst. Die Unteransprüche zeigen bevorzugte Weiterbildungen der Erfindung.This object is achieved by a power wheelchair drive with the features of claim 1. The dependent claims show preferred developments of the invention.

Der erfindungsgemäße Elektrorollstuhlantrieb mit einem bürstenbehafteten DC Motor, wobei der bürstenbehaftete DC Motor mindestens vier Pole aufweist, ist dadurch gekennzeichnet, dass mindestens zwei Polpaare des bürstenbehafteten DC Motors dauerhaft an je einer unabhängigen Leistungsstufe betrieben werden. Dies ermöglicht durch die erfindungsgemäße Aufteilung der Gesamtleistung auf mehrere Leistungsstufen eine Verringerung der Verlustleistung pro Kabelstrang und Leistungsstufe.The electric wheelchair drive according to the invention with a brushed DC motor, wherein the brushed DC motor has at least four poles, is characterized in that at least two pole pairs of the brushed DC motor are permanently operated at an independent power level. This makes it possible by the inventive division of the total power to several power levels, a reduction in power loss per harness and power level.

Ein weiterer Vorteil der erfindungsgemäßen Verwendung mehrerer Leistungsstufen ist die daraus resultierende Redundanz in der Steuerung. Ist beispielsweise eine Leistungsstufe funktionsunfähig, so bleibt mindestens noch eine zweite Leistungsstufe zur Sicherstellung des Antriebs (Notlaufeigenschaft). Gleiches gilt bei Funktionsausfall einer Bürste bzw. eines Polpaares. Prinzipbedingt kann eine Überlastung des verbleibenden Polpaares verhindert werdenAnother advantage of using multiple power stages according to the invention is the resulting redundancy in the controller. If, for example, one power stage is inoperable, at least one second power level remains to ensure the drive (emergency running property). The same applies in case of malfunction of a brush or a pole pair. Due to the principle of overloading of the remaining pole pair can be prevented

Eine vorteilhafte Ausführungsform der Erfindung sieht zumindest für zwei Polpaare je eine Strom-Messstelle zur Regelung bzw. Limitierung der jeweiligen Phasenströme vor. Dies ermöglicht eine genaue Regelung der einzelnen Leistungsstufen.An advantageous embodiment of the invention provides at least for two pairs of poles each a current measuring point for the regulation or limitation of the respective phase currents. This allows precise control of the individual power levels.

Besonders bevorzugt ist eine Einrichtung zur Erkennung und Auswertung einer Störungssituation (z.B. Unterbrechung bzw. Kurzschluss) in der elektronischen Steuerung. Diese ermöglicht eine angemessene, automatische Reaktion der Steuerung, z.B. die Notabschaltung des betroffenen Stromkreises oder der Übergang in eine Betriebsart mit verminderter Antriebsleistung (Notlauffunktion). Somit kann das Risiko von Folgeschäden nach einer Störung deutlich reduziert werden.
In einer weiteren vorteilhaften Ausführungsform ist eine Einrichtung zur Ermittlung des Gesamtstromes zur Limitierung der Gesamtleistung des bürstenbehafteten DC Motors innerhalb des Elektrorollstuhlantriebs vorgesehen. Die Ströme der einzelnen Leistungsstufen können dazu auch separat gemessen und summiert werden. Dadurch wird eine Überbelastung des DC Motors im Ganzen oder auch in Teilen auch bei der erfindungsgemäßen Verwendung mehrerer Leistungsstufen vermieden.Particularly preferred is a device for detecting and evaluating a fault situation (eg interruption or short circuit) in the electronic control. This allows a suitable, automatic reaction of the control, eg the emergency shutdown of the affected circuit or the Transition to a mode with reduced drive power (emergency function). Thus, the risk of consequential damage after a disturbance can be significantly reduced.
In a further advantageous embodiment, a device for determining the total current for limiting the total power of the brushed DC motor within the electric wheelchair drive is provided. The currents of the individual power levels can also be measured and summed separately. As a result, an overload of the DC motor as a whole or in parts is avoided even when using multiple power levels according to the invention.

Zur weiteren Kontrolle und Überwachung des DC Motors dienen erfindungsgemäß bevorzugt eingesetzte Spannungs-Messstellen zur Messung der Klemmspannung des jeweiligen Polpaares. Besonders vorteilhaft sind Einrichtungen zur Ermittlung einer rechnerischen Drehgeschwindigkeit zur Regelung der Motordrehzahl. Dadurch kann eine, vom Rollstuhlfahrer gewünschte Geschwindigkeit eingehalten und angezeigt werden.For further control and monitoring of the DC motor used according to the invention preferably used voltage measuring points for measuring the terminal voltage of the respective pole pair. Particularly advantageous are devices for determining a calculated rotational speed for controlling the engine speed. This allows a, desired by the wheelchair speed and displayed.

Vorteilhaft ist die Messung der Klemmenspannung an nicht Strom führenden Bürsten zur Ermittlung des Drehzahlistwertes. Dies ermöglicht eine Drehzahlregelung ohne weitere Sensoren.It is advantageous to measure the terminal voltage on non-current-carrying brushes to determine the actual speed value. This allows speed control without additional sensors.

Besonders bevorzugt ist die erfindungsgemäße Verwendung einer Steuerung für den Elektrorollstuhlantrieb, welche alternativ zwei unabhängige bürstenbehaftete DC Motoren betreiben kann. In Abwandlung einer solchen universellen Steuerung, z.B. durch Parametrierung, können anstelle von zwei Motoren erfindungsgemäß bevorzugt die beiden Polpaare eines vierpoligen DC Motors betrieben werden. Alle weiteren Einrichtungen der Steuerung (Ansteuerung der Federdruckbremse, Ansteuerung einer Fahrzeugbeleuchtung usw.) können unverändert weiter verwendet werden. Besonderer Vorteil der Steuerung, welche alternativ zwei unabhängige bürstenbehaftete DC Motoren betreiben kann, ist die mögliche Verwendung erprobter, konventioneller Steckverbindungen anstelle teurer Speziallösungen. Somit minimiert sich der Aufwand für die Anpassung bestehender Steuerdesigns an den erfindungsgemäßen Elektrorollstuhlantrieb.Particularly preferred is the inventive use of a controller for the electric wheelchair drive, which can operate alternatively two independent brushed DC motors. In a modification of such a universal control, for example by parameterization, instead of two motors according to the invention preferably the two pole pairs of a four-pole DC motor can be operated. All other devices of the controller (control of the spring-loaded brake, control of vehicle lighting, etc.) can continue to be used unchanged. Special advantage of the control, which alternatively can operate two independent brushed DC motors is the potential use of proven conventional connectors rather than expensive special solutions. Thus, the effort for the adaptation of existing control designs minimizes the electric wheelchair drive according to the invention.

Besonders in Elektrorollstühlen zeigt sich die erfindungsgemäße Notlaufeigenschaft durch die Verwendung mehrerer Leistungsstufen als besonders Vorteilhaft. Das Risiko eines bewegungsunfähigen Rollstuhls wird minimiert. Aus der erfindungsgemäßen Messung der Drehgeschwindigkeit des DC Motors resultiert die Möglichkeit die Geschwindigkeit des Rollstuhls zu kontrollieren bzw. zu limitieren. Dies kann besonders bei der Nutzung des Fahrzeuges durch eine behinderte Person von großem Vorteil sein.Especially in electric wheelchairs, the emergency running property according to the invention by the use of several power levels is particularly advantageous. The risk of an immobilized wheelchair is minimized. From the inventive measurement of the rotational speed of the DC motor results in the possibility of controlling the speed of the wheelchair or limit. This can be of great advantage, especially when using the vehicle by a disabled person.

Der Begriff Elektrorollstuhl im Rahmen dieser Erfindung umfasst neben Elektrorollstuhl auch rollstuhlähnliche Elektromobile für gehbehinderte Personen.The term power wheelchair in the context of this invention includes in addition to electric wheelchair and wheelchair-like electric vehicles for people with mobility impairments.

Nachfolgend wird ein bevorzugtes Ausführungsbeispiel der Erfindung unter Bezugnahme auf die Zeichnung beschrieben. In der Zeichnung ist:

Fig. 1
eine Prinzipdarstellung eines vierpoligen bürstenbehafteten DC Motors an einer 2-kanaligen Steuerung.
Hereinafter, a preferred embodiment of the invention will be described with reference to the drawings. In the drawing is:
Fig. 1
a schematic diagram of a four-pole brushed DC motor on a 2-channel controller.

Nachfolgend wird unter Bezugnahme auf Fig. 1 ein Elektrorollstuhlantrieb 1 gemäß einem Ausführungsbeispiel der Erfindung beschrieben.The following is with reference to Fig. 1 an electric wheelchair drive 1 according to an embodiment of the invention described.

Fig. 1 zeigt als Ausführungsbeispiel den erfindungsgemäßen Aufbau eines Elektrorollstuhlantriebs 1 mit zwei Leistungsstufen 5, 6, einer Batterie 4, einem vierpoligen DC (Gleichstrommotor) Motor 2 und einer Federdruckbremse 3 sowie einer Bremssteuerung 7 der Federdruckbremse 3. Fig. 1 shows as an exemplary embodiment of the inventive construction of an electric wheelchair drive 1 with two power levels 5, 6, a battery 4, a four-pole DC (DC motor) motor 2 and a spring pressure brake 3 and a brake control 7 of the spring-loaded brake third

Die Leistungsstufen 5, 6 sowie die Bremssteuerung 7 sind über die Leitungen 10 mit der Batterie 4 verbunden. Für den Fachmann nahe liegend ist hier die Verwendung jeglicher Batterie- bzw. Akkumulatorenarten.The power levels 5, 6 and the brake control 7 are connected via the lines 10 to the battery 4. For those skilled in the obvious here is the use of any type of battery or Akkumulatorenarten.

Desweiteren ist die erste Leistungsstufe 5 über die elektrischen Leitungen 11 sowie über Bürsten am Motor 2 mit dem ersten Polpaar 8 des Motors 2 verbunden. Ähnlich hierzu, ist die zweite Leistungsstufe 6 über die elektrischen Leitungen 12 sowie über Bürsten am Motor 2 mit dem zweiten Polpaar 9 des Motors 2 verbunden.Furthermore, the first power stage 5 is connected via the electrical lines 11 and brushes on the motor 2 to the first pole pair 8 of the motor 2. Similarly, the second power stage 6 is connected via the electrical lines 12 and brushes on the motor 2 to the second pole pair 9 of the motor 2.

Die Energie der Batterie 4 kann somit entweder über beide Leistungsstufen 5,6 oder nur über eine der beiden Leistungsstufen 5, 6 den Motor 2 antreiben. Erfindungsgemäß vorgesehen ist sowohl die Verwendung von stufenlos als auch nicht stufenlos regelbaren Leistungsstufen. Eine Notlaufeigenschaft des Elektrorollstuhlantriebs 1 ergibt sich aus der Möglichkeit, den Motor 2 auch nur mit einer der beiden Leistungsstufen 5,6 betreiben zu können. Des Weiteren reduziert sich die Verlustleistung pro Leitung, da die Gesamtstrombelastung auf Leitung 11 und Leitung 12 aufgeteilt wird.The energy of the battery 4 can thus drive the motor 2 either via both power stages 5, 6 or only via one of the two power stages 5, 6. Provided according to the invention is both the use of infinitely variable and not continuously adjustable power levels. An emergency running property of the electric wheelchair drive 1 results from the possibility of being able to operate the engine 2 with only one of the two power levels 5, 6. Furthermore, the power loss per line is reduced as the total current load is split between line 11 and line 12.

Die Ansteuerung der Federdruckbremse 3 über die Leitung 13 und die Bremsansteuerung 7 wird ermöglicht, durch die erfindungsgemäße Verwendung einer Steuerung, welche alternativ zwei unabhängige bürstenbehaftete DC Motoren betreiben kann.The control of the spring pressure brake 3 via the line 13 and the brake control 7 is made possible by the inventive use of a controller, which alternatively can operate two independent brushed DC motors.

Durch anschließen einer solchen Steuerung an nur einen Motor 2 jedoch mit zwei Polpaaren 8,9 kann eine bestehende Bremsansteuerung 7 weiterverwendet werden.By connecting such a control to only one motor 2 but with two pairs of poles 8,9 an existing brake control 7 can be used.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
ElektrorollstuhlantriebElectric wheelchair drive
22
Vierpoliger DC MotorFour-pole DC motor
33
elektromechanische Federdruckbremseelectromechanical spring-loaded brake
44
Batteriebattery
55
Erste LeistungsstufeFirst performance level
66
Zweite LeistungsstufeSecond power level
77
Bremssteuerungbrake control
88th
Erstes PolpaarFirst pole pair
99
Zweites PolpaarSecond pole pair
10-1310-13
elektrische Leitungenelectric lines

Claims (7)

Elektrorollstuhlantrieb (1) mit einem bürstenbehafteten DC Motor (2), wobei der bürstenbehaftete DC Motor (2) mindestens vier Pole aufweist, dadurch gekennzeichnet, dass mindestens zwei Polpaare (8, 9) des bürstenbehafteten DC Motors (2) dauerhaft an je einer unabhängigen Leistungsstufe (5, 6) betrieben werden.Electric wheelchair drive (1) with a brushed DC motor (2), wherein the brushed DC motor (2) has at least four poles, characterized in that at least two pairs of poles (8, 9) of the brushed DC motor (2) permanently to an independent Power level (5, 6) are operated. Elektrorollstuhlantrieb nach Anspruch 1, dadurch gekennzeichnet, dass zumindest für die zwei Polpaare (8, 9) je eine Strom-Messstelle zur Regelung bzw. Limitierung der jeweiligen Phasenströme vorgesehen ist.Electric wheelchair drive according to claim 1, characterized in that at least for the two pole pairs (8, 9) is provided in each case a current measuring point for controlling or limiting the respective phase currents. Elektrorollstuhlantrieb nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass eine Einrichtung zur Erkennung und Auswertung einer Kurzschlusssituation an den Leitungen (11, 12) oder am Motor (2) vorgesehen ist.Electric wheelchair drive according to claim 1 or 2, characterized in that a device for detecting and evaluating a short-circuit situation on the lines (11, 12) or on the motor (2) is provided. Elektrorollstuhlantrieb nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass eine Einrichtung zur Ermittlung des Gesamtstromes zur Limitierung der Gesamtleistung des bürstenbehafteten DC Motors (2) vorgesehen ist.Electric wheelchair drive according to one of claims 1 to 3, characterized in that a device for determining the total current for limiting the total power of the brushed DC motor (2) is provided. Elektrorollstuhlantrieb nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass zumindest eine Spannungsmessstelle für die Leistungsstufen (5, 6) zur Messung der Klemmspannung des jeweiligen Polpaares (8, 9) vorgesehen ist.Electric wheelchair drive according to one of claims 1 to 4, characterized in that at least one voltage measuring point for the power stages (5, 6) for measuring the clamping voltage of the respective pole pair (8, 9) is provided. Elektrorollstuhlantrieb nach Anspruch 5, dadurch gekennzeichnet, dass eine Einrichtung zur Ermittlung einer rechnerischen Drehgeschwindigkeit zur Regelung der Motordrehzahl vorgesehen ist.Electric wheelchair drive according to claim 5, characterized in that a device for determining a calculated rotational speed for controlling the engine speed is provided. Elektrorollstuhlantrieb nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass eine den Leistungsstufen (5, 6) für die zwei Polpaare (8, 9) übergeordnete Steuerung verwendet wird, welche alternativ zwei unabhängige bürstenbehaftete DC Motoren betreiben kann.Electric wheelchair drive according to one of claims 1 to 6, characterized in that one of the power stages (5, 6) for the two pole pairs (8, 9) superordinate control is used, which can operate alternatively two independent brushed DC motors.
EP09000347.6A 2008-01-17 2009-01-13 Electric wheelchair drive Withdrawn EP2081290A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008004835A DE102008004835B4 (en) 2008-01-17 2008-01-17 Electric wheelchair drive

Publications (2)

Publication Number Publication Date
EP2081290A2 true EP2081290A2 (en) 2009-07-22
EP2081290A3 EP2081290A3 (en) 2015-04-08

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EP09000347.6A Withdrawn EP2081290A3 (en) 2008-01-17 2009-01-13 Electric wheelchair drive

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CN107095748A (en) * 2017-05-03 2017-08-29 北京泰格华诚科技有限公司 A kind of brshless DC motor electric wheelchair brake gear

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US6223104B1 (en) * 1998-10-21 2001-04-24 Deka Products Limited Partnership Fault tolerant architecture for a personal vehicle
US6819017B2 (en) * 2002-01-02 2004-11-16 Intel Corporation Method and apparatus for fan redundancy
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Publication number Priority date Publication date Assignee Title
WO1996003798A1 (en) 1994-07-25 1996-02-08 Robert Bosch Gmbh Rotation speed controlled multi-pole pair d.c. motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107095748A (en) * 2017-05-03 2017-08-29 北京泰格华诚科技有限公司 A kind of brshless DC motor electric wheelchair brake gear

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DE102008004835B4 (en) 2010-04-01
EP2081290A3 (en) 2015-04-08

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